Tunable high-temperature superconductivity in monolayer Bi2Sr2CaCu2O8+δ

ORAL

Abstract

Dimensionality plays a central role in high-temperature superconductivity (HTS). Layered cuprate superconductors hold the record of Tc at ambient pressure. Cuprates in the two-dimensional (2D) limit would provide valuable insights on the nature of HTS and offer unprecedented tunability in their material properties. Half-unit-cell-thick single crystal of Bi2Sr2CaCu2O8+δ (referred to as monolayer Bi-2212) is such an ideal 2D system. Here we fabricate transport devices from monolayer Bi-2212 samples obtained by exfoliation and study the evolution of superconductivity as the dimensionality and doping level is varied. We find that superconductivity remains intact in monolayer Bi-2212. Finite size scaling analysis at superconductor-to-insulator transition (SIT) reveals distinct critical behaviors at different disorder levels. Our study leads to a unified picture of SITs previously reported in cuprate systems.

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Presenters

  • Yijun Yu

    Fudan University, Physics Department, Fudan University

Authors

  • Yijun Yu

    Fudan University, Physics Department, Fudan University

  • Liguo Ma

    Fudan University, Physics Department, Fudan University

  • Peng Cai

    Fudan University, Physics Department, Fudan University

  • Ruidan Zhong

    Brookhaven National Lab, Department of Chemistry, Princeton University, Department of Condensed Matter Physics and Materials Science, Brookhaven, Brookhaven National Laboratory, Upton, New York 11973-5000, USA., Brookhaven National Laboratory, Condensed Matter Physics & Materials Science, Brookhaven National Laboratory, Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Brookhaven National Laboratories

  • Cun Ye

    Fudan University, Physics Department, Fudan University

  • Jian Shen

    Fudan University, Physics Department, Fudan University

  • Genda Gu

    Brookhaven National Laboratory, Brookhaven National Lab, Department of Condensed Matter Physics and Materials Science, Brookhaven, Brookhaven National Laboratory, Upton, New York 11973-5000, USA., Cond. Matt. Physics and Material Science, Brookhaven Natl Lab, Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory, Brookhaven National Labs, Long Island, NY, USA, 11973, Condensed Matter Physics & Materials Science, Brookhaven National Laboratory, Condensed Matter Physics, Brookhaven National Laboratory, Brookhaven National Laboratories, Chinese Academy of Sciences, Condensed Matter Physics & Materials Science, Brookhaven National Lab, Brookhaven Natl Lab

  • Xianhui Chen

    University of Science and Technology of China, Department of physics, University of Science and Technology of China

  • Yuanbo Zhang

    Fudan University, State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Institute for Nanoelectronic Devices and Quantum Computing, Fudan University, Shanghai 200433, China, Dept. of Physics, Fudan University, Physics Department, Fudan University